Carbureting means for use with heavy fuels.



H A. c. STEWARL CARBURETI'NG MEANS FOR USE WH'H HEAVY FUELS.

AFPLICATIQIHLED MIG-28| 1915, I Patented July 31,1917.

mam i riiwenxfor LOS AN EL f (influx-Emma MEANS 103 se WIT-H nmvYronLs.

Subntlthte tor applicatioil Seriai No. 799,506fifllu! November 5. 1913.

' V 1915." Serial No. 7,771

a cit eh Tithe IIILitGdQSCELtBS,,lesldingijtt e1 iu'the eoiinty-o'f; LosAngeles To "Galifornia; have invented'a 13' Improvement in Ca 'hurev 1'- USE withHexivy Fuels, of

(it of the; preseut invention };th6 some subjeet-mettei is 199,396, filed Nyem o iitovide for applying w and economical manner xrii'zit'ur t' supplied by theuc arth internal combustion enthe, teatime e eetled, viz., when men @111 lliliSfi-ittflti. an said drawing the. carburoter ii v m e outletfto irisiuifold 9 lead- 1.1. e atin geh p 56 8 t I Speeificetion oI Letters Patent.

-with regul'ating "valve 13.

m (1.19mi? at the i under these conditions {1 portimi of ti the outlet iigthmzvhy ehui giugfthef chamber with eouliuisti'bie'mixture "the engine "current isv sent causing a spark The eomhusti on of the AL-time (moon- 0- the Queen e ontheiippr theorem throttle. Said vconduit 12 may G'ALIFQitNIIAQi ,This pp cation mm August 2;;

An igniting menus, for example, it spark plug 1 1 is pr o vhled in the ehumher 8 drawn there uto.

to ignite the charge The tube 12 communicates 'with the mix- 3 at a point above the seating point of the I is closed it he; below the outlet end of the tube tbpauik plug l t may usual igniti u circuit be conneetedto the c itethin the di'aivii1g, Whei'ein 15 hand-16 designate the tires ofu'uy usual ons ultable gnition cn'ouit, leading to an engme spai k plug. 17 sgu d wn es ted respectivel t valve 11, the t is, when the vg lve in parallel With-one of the spark plugs of the engine, esindi f 15' and 16 beingcon the electrodes ofth'e spark plug 17; ltwillhe understoodthat one ofthese-oireuit wires, for example, 15, is grounded; to the engine as indicated M218, and ue-of ihefleeti'odes of the's'Parkplug 14 is also grouudediu the usuiil manuexqthe otherv eleetroiie being connected by wire 16' to the ignition circuit wire 16. I

-The operation as follows: lu stm ting the engine the throttle 1.1 'aiso slightly opened, so that there is a considerably greater condition of SLietimi or vacuum on the side of the throttie toward the engine than existsin; the mixing chamber; heuee, 16mm ture is thrown from the 'mixiiig' e timber through the tube 10 into theheii tiu'g{51mmhvr 8 mid thencethrough the t'u'iw "12 to f n rting,

turned over? L111 th i oi igh the. s] rk';

within the heiitlug' o omhei for igniting the mixture therein; The tubes 10 and 12 are of jeiiiiii'eient length itiid smelt bore and. mick iiutlls j'of matetiei, us; to fire-tent" the ignition from beiugjtiu usniitt'edj"ffem the heating 'vhumber'to vthe l niiling ehuifiher 4i,

the mixture v The produetskif tiombustion are exhausted through the tube 12' "and are in such minute quantities" that they have no .v appreciable eflect, upon mlxture.

the earbureted.

The heating chamber 8 and the tubes 10 and 12 are comparatively small. back pressure. while present is so small that it does not in- Therefore, the pulsating or heavier fuels than gasolene, for example,

kerosene and distillate, but the use of these heavy fuels is open to the objection that it is difiicult to vaporize the same and to form an efl'ective mixture with the air, particularly when the engine is cold as in starting. By the above described 0 eration 'suflicient heat is imparted to the we ls in-contact with the mixture to insure vaporization of the fuel and effective mixture thereof with the air." It will be noted that as the throttle 11 is opened wider, condition of suction at the outlet 12 of the heating chamberapproaches more closely to the condition within the mixing chamber so that relatively less charge is drawn through the heating cham ber, therefore, after the engine has bee:- started and the throttle is opened wider, less charge is drawn into the heating chamher and less heat is applied to the fuel and mixture, this being desirable for the reasonthat less heat is required under these conditions due to the fact that the carbureter is then receiving heat directly from the engine. f

It will be noted that an advantage of the present invention is that the initial. heating of the carburetor is not de endent upon heat from the engine, so that the engine may be started cold, whereas, in those oarbureter heating systems depending upon the use of exhaust gases, the-engine must be starte before the heating action is effected. The

method of heating by combustion of the,

mixture as above described much more economical than where electric current is used directly for heating, the consumption of currentjin igniting the mixture being negligible with'that which would be required to produce the heating efi'ect maintained by combustion of a portion of the mixture as described.

What I claim is:

1. In combination with a caroureter provided with a mixing chamber andwith an outlet therefrom for supplying mixture to an engine, a combustion chamber located in heating. relation to .said mixing chamber and communicating therewith to receive combustible mixture therefrom independently of the mixture ,passing through said outlet, and means'fo'r igniting the charge in said combustion chamber.

said carbureter to heat the mixture passing 1 therethrough means for supplying mixture from the car ureter to said heating chamber, means for igniting the mixture in said chamber, and means for discharging the products of combustion from said chamber to the outlet of the carburetor. 3. In combination with a carburetor pro vided with a mixing chamber and with an outlet, a combustion chamber adjacent to said. mixing chamber to heat the same and communicating with said mixing chamber and also communicating with the outlet, a throttle located in the outlet between the points where, the said combustion chamber communicates with-the mixing chamber and with the'outlet, and igniting means for the combustible in said combustion chamber.

4. In combination with a carburetor provided with a. mixing chamber and with an outlet, a combustion chamber adjacent to said carbureter to heat the same, a conduit establishing communication from the mixing chamber to said combustion chamber, said conduit being restricted to preventpassage of flame therethrough, and igniting means in said combustion chamber.

5. In combination with a carburetcr provided with a mixing chamber and an outlet, a combustion chamber adjacent said mixing chamber to heat'the' same and provided with a. restricted communication with saidcombustion chamber and with a restricted com-' municution with said outlet, at throttle in the outlet between-the points of communication of the combustion chamber with the mixing chamber and outlet, and means for igniting the charge in said combustion chamber.

6. The. combination of a carbureter provided with a mixing chamber and'with an.

outlet, of a combustion chamber adjacent to and surrounding the outlc'tof the carburetor intake port tosupply mixture from the mixng chamber to the combustion chamber and an outlet port communicating with the mixto heat the same, said chamber having an 1 small ports such thatwill-not allow propagation of ignition from the chamber into the outlet. I I i 7. The combination with the ignition circuit of an internal combustion engine and a carburetor having an outlet connected with the engine to supply a combustible mixture thereto, of a combustion chamber located in heating relation to the outlet, said chamber having an intake port to supply mixture from the mixing chamber to the combustion chamber and an outletport communicating chamber said ports being relatively n and e ectrical igniting means in the chamber connected with the ignition circuit, acid chamber being free from with n 'l' communication with the outlet exoe t-for relatively small ports such that W1 I allow propagation of chamber into the outlet.

10 118. The comlliinegi'on witih a cerhurleter |v1ng"' anoutet orsuppyingecomusvtible mixture to an engine, of a. combustion not ignition from the chamber located in heating relation to said i outletgmd communicating therewith to receive a combustible mixture therefrom, ind means for igniting a charge in {said oombue- 15 tion chamber l i In testimon whereof I have heneunto set my hand at es, Ca1iiornia,'this 23d day of August 1915.

"ALFRED c; STEWART.- presence of.-

L. Bm Wu Luna 8. Ann. 

